Stool



FIG. 1 is a front elevational view showing our new design, the rear view being the same;

FIG. 2 is a left-side elevational view thereof, the right-side elevational view being the same;

FIG. 3 is an elevation view thereof, with the stool rotated about the vertical axis to a position intermediate that of FIG. 1 and FIG. 2; and,

FIG. 4 is a perspective view thereof.

In FIGS. 1-4, features shown in broken-line depict environmental subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a stool, as shown and described. 